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Entry version 25 (29 Sep 2021)
Sequence version 2 (26 Feb 2020)
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Methyltransferase phqN



Penicillium fellutanum
Reviewed-Annotation score:

Annotation score:2 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the 'correct annotation' for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>
-Protein inferred from homologyi <p>This indicates the type of evidence that supports the existence of the protein. Note that the 'protein existence' evidence does not give information on the accuracy or correctness of the sequence(s) displayed.<p><a href='/help/protein_existence' target='_top'>More...</a></p>

<p>This section provides any useful information about the protein, mostly biological knowledge.<p><a href='/help/function_section' target='_top'>More...</a></p>Functioni

Methyltransferase; part of the gene cluster that mediates the biosynthesis of paraherquamide, a fungal indole alkaloid that belongs to a family of natural products containing a characteristic bicyclo[2.2.2]diazaoctane core (PubMed:23213353).

The first steps in the biosynthesis of paraherquamide is the production of the beta-methyl-proline precursor from L-isoleucine (Probable). They require oxidation of a terminally hydroxylated L-isoleucine to the corresponding aldehyde by enzymes which have still to be identified (Probable). Spontaneous cyclization and dehydration would yield the 4-methyl pyrolline-5-carboxylic acid, which is then reduced by the pyrroline-5-carboxylate reductase phqD leading to the beta-methyl-proline precursor (Probable). The next step of paraherquamide biosynthesis involves coupling of beta-methyl-proline and L-tryptophan by the bimodular NRPS phqB, to produce a monooxopiperazine intermediate (Probable). The reductase (R) domain of phqB utilizes NADPH for hydride transfer to reduce the thioester bond of the T domain-tethered linear dipeptide to a hemithioaminal intermediate, which spontaneously cleaves the C-S bond to release the aldehyde product (PubMed:31548667).

This compound undergoes spontaneous cyclization and dehydration to give a dienamine which is reverse prenylated at C-2 by the reverse prenyltransferase phqJ (Probable). The other prenyltransferase present in the cluster, phqI may be a redundant gene in the pathway (Probable). During biosynthetic assembly, the key step to produce the polycyclic core is catalyzed by the bifunctional reductase and intramolecular [4+2] Diels-Alderase, phqE, resulting in formation of the [2.2.2] diazaoctane intermediate preparaherquamide (PubMed:31548667).

Following formation of preparaherquamide, an indole 2,3-epoxidation-initiated pinacol-like rearrangement is catalyzed by the phqK FAD-dependent monooxygenase (Probable). The prenyltransferase phqA, the cytochrome P450 monooxygenase phqL, and the FAD-linked oxidoreductase phqH (or the cytochrome P450 monooxygenase phqM), are proposed to be involved in the formation of the pyran ring (Probable). The FAD-dependent monooxygenase phqK is likely responsible for generation of the spiro-oxindole, and the N-methylation is likely mediated by the phqN methyltransferase leading to the isolable natural product paraherquamide F (Probable). However, the order of these biosynthetic steps has still to be determined (Probable). In late-stage paraherquamide biosynthesis, the third P450 monooxygenase, phqO, is probably responsible for the C-14 hydroxylation, transforming paraherquamide F to paraherquamide G, and paraherquamide E to the final product paraherquamide A (Probable). The expansion from the 6-membered ring pyran (in paraherquamides F and G) to the 7-membered dioxepin ring (in paraherquamides A and E) represents a poorly understood but intriguing process that probably involves the 2-oxoglutarate-dependent dioxygenase phqC (Probable). Finally, the remaining members of the paraherquamide cluster, including phqI as well as phqM (or phqH), do not have a clearly prescribed role and appear to be redundant (Probable).

1 Publication2 Publications

<p>This subsection of the <a href="">'Function'</a> section describes the metabolic pathway(s) associated with a protein.<p><a href='/help/pathway' target='_top'>More...</a></p>Pathwayi: Alkaloid biosynthesis

This protein is involved in Alkaloid biosynthesis.1 Publication
View all proteins of this organism that are known to be involved in Alkaloid biosynthesis.

<p>The <a href="">Gene Ontology (GO)</a> project provides a set of hierarchical controlled vocabulary split into 3 categories:<p><a href='/help/gene_ontology' target='_top'>More...</a></p>GO - Molecular functioni

GO - Biological processi

<p>UniProtKB Keywords constitute a <a href="">controlled vocabulary</a> with a hierarchical structure. Keywords summarise the content of a UniProtKB entry and facilitate the search for proteins of interest.<p><a href='/help/keywords' target='_top'>More...</a></p>Keywordsi

Molecular functionMethyltransferase, Transferase

<p>This section provides information about the protein and gene name(s) and synonym(s) and about the organism that is the source of the protein sequence.<p><a href='/help/names_and_taxonomy_section' target='_top'>More...</a></p>Names & Taxonomyi

<p>This subsection of the <a href="">Names and taxonomy</a> section provides an exhaustive list of all names of the protein, from commonly used to obsolete, to allow unambiguous identification of a protein.<p><a href='/help/protein_names' target='_top'>More...</a></p>Protein namesi
Recommended name:
Methyltransferase phqN1 Publication (EC:2.1.1.-1 Publication)
Alternative name(s):
Paraherquamide biosynthesis cluster protein N1 Publication
<p>This subsection of the <a href="">Names and taxonomy</a> section indicates the name(s) of the gene(s) that code for the protein sequence(s) described in the entry. Four distinct tokens exist: 'Name', 'Synonyms', 'Ordered locus names' and 'ORF names'.<p><a href='/help/gene_name' target='_top'>More...</a></p>Gene namesi
Name:phqN1 Publication
<p>This subsection of the <a href="">Names and taxonomy</a> section provides information on the name(s) of the organism that is the source of the protein sequence.<p><a href='/help/organism-name' target='_top'>More...</a></p>OrganismiPenicillium fellutanum
<p>This subsection of the <a href="">Names and taxonomy</a> section shows the unique identifier assigned by the NCBI to the source organism of the protein. This is known as the 'taxonomic identifier' or 'taxid'.<p><a href='/help/taxonomic_identifier' target='_top'>More...</a></p>Taxonomic identifieri70095 [NCBI]
<p>This subsection of the <a href="">Names and taxonomy</a> section contains the taxonomic hierarchical classification lineage of the source organism. It lists the nodes as they appear top-down in the taxonomic tree, with the more general grouping listed first.<p><a href='/help/taxonomic_lineage' target='_top'>More...</a></p>Taxonomic lineageiEukaryotaFungiDikaryaAscomycotaPezizomycotinaEurotiomycetesEurotiomycetidaeEurotialesAspergillaceaePenicillium

<p>This section describes post-translational modifications (PTMs) and/or processing events.<p><a href='/help/ptm_processing_section' target='_top'>More...</a></p>PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'PTM / Processing' section describes the extent of a polypeptide chain in the mature protein following processing or proteolytic cleavage.<p><a href='/help/chain' target='_top'>More...</a></p>ChainiPRO_00004488761 – 326Methyltransferase phqNAdd BLAST326

<p>This section provides information on the tertiary and secondary structure of a protein.<p><a href='/help/structure_section' target='_top'>More...</a></p>Structurei

<p>This section provides information on sequence similarities with other proteins and the domain(s) present in a protein.<p><a href='/help/family_and_domains_section' target='_top'>More...</a></p>Family & Domainsi

<p>This subsection of the 'Family and domains' section provides information about the sequence similarity with other proteins.<p><a href='/help/sequence_similarities' target='_top'>More...</a></p>Sequence similaritiesi

Belongs to the class I-like SAM-binding methyltransferase superfamily. Erg6/SMT family.PROSITE-ProRule annotation

Family and domain databases

Integrated resource of protein families, domains and functional sites

View protein in InterPro
IPR013216, Methyltransf_11
IPR030384, MeTrfase_SMT
IPR029063, SAM-dependent_MTases
IPR013705, Sterol_MeTrfase_C

Pfam protein domain database

View protein in Pfam
PF08241, Methyltransf_11, 1 hit
PF08498, Sterol_MT_C, 1 hit

Superfamily database of structural and functional annotation

SSF53335, SSF53335, 1 hit

PROSITE; a protein domain and family database

View protein in PROSITE
PS51685, SAM_MT_ERG6_SMT, 1 hit

<p>This section displays by default the canonical protein sequence and upon request all isoforms described in the entry. It also includes information pertinent to the sequence(s), including <a href="">length</a> and <a href="">molecular weight</a>. The information is filed in different subsections. The current subsections and their content are listed below:<p><a href='/help/sequences_section' target='_top'>More...</a></p>Sequencei

<p>This subsection of the <a href="">Sequence</a> section indicates if the <a href="">canonical sequence</a> displayed by default in the entry is complete or not.<p><a href='/help/sequence_status' target='_top'>More...</a></p>Sequence statusi: Complete.

L0E172-1 [UniParc]FASTAAdd to basket
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Mass (Da):36,123
Last modified:February 26, 2020 - v2
<p>The checksum is a form of redundancy check that is calculated from the sequence. It is useful for tracking sequence updates.</p> <p>It should be noted that while, in theory, two different sequences could have the same checksum value, the likelihood that this would happen is extremely low.</p> <p>However UniProtKB may contain entries with identical sequences in case of multiple genes (paralogs).</p> <p>The checksum is computed as the sequence 64-bit Cyclic Redundancy Check value (CRC64) using the generator polynomial: x<sup>64</sup> + x<sup>4</sup> + x<sup>3</sup> + x + 1. The algorithm is described in the ISO 3309 standard. </p> <p class="publication">Press W.H., Flannery B.P., Teukolsky S.A. and Vetterling W.T.<br /> <strong>Cyclic redundancy and other checksums</strong><br /> <a href="">Numerical recipes in C 2nd ed., pp896-902, Cambridge University Press (1993)</a>)</p> Checksum:iC185411B87A6A553

<p>This subsection of the 'Sequence' section reports difference(s) between the protein sequence shown in the UniProtKB entry and other available protein sequences derived from the same gene.<p><a href='/help/sequence_caution' target='_top'>More...</a></p>Sequence cautioni

The sequence AGA37281 differs from that shown. Reason: Erroneous gene model prediction.Curated

Sequence databases

Select the link destinations:

EMBL nucleotide sequence database


GenBank nucleotide sequence database


DNA Data Bank of Japan; a nucleotide sequence database

Links Updated
JQ708195 Genomic DNA Translation: AGA37281.1 Sequence problems.

<p>This section is used to point to information related to entries and found in data collections other than UniProtKB.<p><a href='/help/cross_references_section' target='_top'>More...</a></p>Cross-referencesi

Sequence databases

Select the link destinations:
Links Updated
JQ708195 Genomic DNA Translation: AGA37281.1 Sequence problems.

3D structure databases

Database of comparative protein structure models


SWISS-MODEL Interactive Workspace

Submit a new modelling project...

Family and domain databases

InterProiView protein in InterPro
IPR013216, Methyltransf_11
IPR030384, MeTrfase_SMT
IPR029063, SAM-dependent_MTases
IPR013705, Sterol_MeTrfase_C
PfamiView protein in Pfam
PF08241, Methyltransf_11, 1 hit
PF08498, Sterol_MT_C, 1 hit
SUPFAMiSSF53335, SSF53335, 1 hit
PROSITEiView protein in PROSITE
PS51685, SAM_MT_ERG6_SMT, 1 hit

MobiDB: a database of protein disorder and mobility annotations


<p>This section provides general information on the entry.<p><a href='/help/entry_information_section' target='_top'>More...</a></p>Entry informationi

<p>This subsection of the 'Entry information' section provides a mnemonic identifier for a UniProtKB entry, but it is not a stable identifier. Each reviewed entry is assigned a unique entry name upon integration into UniProtKB/Swiss-Prot.<p><a href='/help/entry_name' target='_top'>More...</a></p>Entry nameiPHQN_PENFE
<p>This subsection of the 'Entry information' section provides one or more accession number(s). These are stable identifiers and should be used to cite UniProtKB entries. Upon integration into UniProtKB, each entry is assigned a unique accession number, which is called 'Primary (citable) accession number'.<p><a href='/help/accession_numbers' target='_top'>More...</a></p>AccessioniPrimary (citable) accession number: L0E172
<p>This subsection of the 'Entry information' section shows the date of integration of the entry into UniProtKB, the date of the last sequence update and the date of the last annotation modification ('Last modified'). The version number for both the entry and the <a href="">canonical sequence</a> are also displayed.<p><a href='/help/entry_history' target='_top'>More...</a></p>Entry historyiIntegrated into UniProtKB/Swiss-Prot: February 26, 2020
Last sequence update: February 26, 2020
Last modified: September 29, 2021
This is version 25 of the entry and version 2 of the sequence. See complete history.
<p>This subsection of the 'Entry information' section indicates whether the entry has been manually annotated and reviewed by UniProtKB curators or not, in other words, if the entry belongs to the Swiss-Prot section of UniProtKB (<strong>reviewed</strong>) or to the computer-annotated TrEMBL section (<strong>unreviewed</strong>).<p><a href='/help/entry_status' target='_top'>More...</a></p>Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programFungal Protein Annotation Program

<p>This section contains any relevant information that doesn't fit in any other defined sections<p><a href='/help/miscellaneous_section' target='_top'>More...</a></p>Miscellaneousi


  1. PATHWAY comments
    Index of metabolic and biosynthesis pathways
  2. SIMILARITY comments
    Index of protein domains and families
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